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Tires  
A tire is a ring-shaped covering that fits around a wheel rim to protect it and enable better vehicle performance by providing a flexible cushion that absorbs shock while keeping the wheel in close contact with the ground.
The word itself may be derived from the word "tie," which refers to the outer steel ring part of a wooden cart wheel that ties the wood segments together (see Etymology below).

The fundamental materials of modern tires are rubber and fabric along with other compound chemicals. They consist of a tread and a body. The tread provides traction while the body ensures support. Before rubber was invented, the first versions of tires were simply bands of metal that fitted around wooden wheels in order to prevent wear and tear. Today, the vast majority of tires are pneumatic, comprising a doughnut-shaped body of cords and wires encased in rubber and generally filled with compressed air to form an inflatable cushion. Pneumatic tires are used on many types of vehicles, such as bicycles, motorcycles, cars, trucks, earthmovers, and aircraft.
  • 1937 – BFGoodrich introduces the first commercial synthetic rubber tire
  • 1938 – Goodyear introduces the rayon cord tire
  • 1946 – Michelin introduces the radial tire
  • 1947 – Goodyear introduces first nylon belted tires
  • 1947 – BFGoodrich announces the tubeless tire[8]
  • 1963 – Use of polyester cord introduced by Goodyear
  • 1965 – Armstrong Rubber introduces the bias belted fiberglass tire
  • 1965 – BFGoodrich offers the first radial available in North America
  • 1967 – Poly/glass tires introduced by Firestone and Goodyear
  • 1968 – United States Department of Transportation (DOT) numbers required on new tires in U.S.
  • 1974 – Pirelli introduces the wide (low aspect ratio) radial tire
  • 2000 – Firestone recalls tires after Congressional hearings into rollover accidents of Ford Explorers in Firestone and Ford tire controversy.

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